If drinking tea is not healthy, it may cause cancer? A study of 500,000 Chinese tells you the answer

It can be said that Chinese people have a long history of drinking tea, and many interpersonal exchanges and business are carried out on the tea table. Some people regard drinking tea as a kind of health preservation, and some people think that drinking tea improperly will be harmful to the body. Is it good for the heart to insist on drinking tea every day?

1. Is it good for the heart to insist on drinking tea every day?

Drinking tea can refresh the mind and promote interpersonal communication, but many people have debated whether drinking tea is good for the heart.

Tea is rich in tea polyphenols, catechins and other flavonoid antioxidants, and also rich in caffeine. Drinking tea properly is good for the heart and cardiovascular, and can prevent stroke.

A study in the American Journal of Nutrition showed that drinking more than three cups of tea a day could help prevent stroke. A study in the "Journal of the American Heart Association" analyzed the relationship between blood high-density lipoprotein cholesterol levels and tea drinking in more than 80,000 Chinese people, and concluded that long-term adherence to tea drinking will reduce high-density lipoprotein cholesterol levels. slow, the risk of cardiovascular disease can be reduced by 8%.

Second, often drinking tea is cancer prevention or cancer?

Does drinking tea prevent cancer or cause cancer? This problem has troubled many people, which requires us to first understand the relationship between tea drinking and cancer.

First of all, tea contains various organic components such as tea polyphenols, theanine, alkaloids, tea polysaccharides, and also contains 3.5%-7% of inorganic substances. beneficial effect.

In 2019, a large survey study of more than 500,000 people in China tried to assess the relationship between tea drinking and the incidence of six types of cancer, including lung, stomach, bowel, liver, breast and cervical cancer, and found that excluded In addition to alcohol, smoking and other factors , tea drinking has nothing to do with the risk of five types of cancer , but drinking too much tea will increase the risk of stomach cancer. At present, the correlation between tea drinking and cancer still needs to be studied.

It should also be noted that the International Agency for Research on Cancer has classified hot drinks above 65 degrees as a Class 2A carcinogen, so people who like to drink tea while it is hot should pay more attention.

3. Drinking tea can keep you healthy! But pay attention to these points

Drinking tea can indeed have a certain health effect. If you want to drink tea for health, you must pay more attention to the following points.

Proper drinking of green tea can play a role in preventing cancer, protecting eyes, preventing dementia, protecting teeth, benefiting the heart, anti-aging, improving muscle endurance, etc. However, when drinking tea, you should pay attention to the following points: The health effects may be better.

1. Do not brew green tea with boiling water

Directly brewing green tea with boiling water will cause the vitamins in the tea to be destroyed. It is recommended to use water at 70-80 degrees to brew green tea.

2. Do not drink tea on an empty stomach

Drinking tea on an empty stomach will cause the tannic acid and polyphenols in the tea to stimulate the stomach and cause symptoms such as gastrointestinal discomfort.

3. Do not store for too long

Dried tea should not be stored for too long, which will reduce the content of green folic acid and affect the absorption of vitamin B1.

4. People with bad stomach should drink less green tea

Green tea is not fermented, and the caffeine and tea polyphenols in it are likely to stimulate the gastrointestinal tract and cause gastrointestinal discomfort.

5. It is not advisable to use a thermos to make tea

Brewing tea with a thermos cup will cause the tea leaves to ferment, the vitamins in them will be destroyed, and a large amount of tannins, theophylline and other substances will be exuded, resulting in a decrease in the nutritional value of the tea leaves.

There are many nutrients in tea, the correct way of drinking tea can play a role in health preservation, but the wrong way of drinking tea, not only can not prevent cancer, but also may be counterproductive. If you want to drink tea for health, you must pay attention to the above precautions.

References:

[1] Is drinking tea bad for the heart? In fact, you are not drinking right! .Journal of Food Science.2019-05-19

[2] Drinking tea is good, but drinking this tea can cause cancer! It's not overnight tea, there are still many people who like to drink it. Family doctor. 2019-10-19

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